21 Oak St, Islip, NY 11751 Property Records

Suffolk County and Islip Town property record for 21 Oak St, Islip, NY 11751

Property Summary

Property Type	Single Family Home
Lot Size	0.14 acres (6,098 sqft)
Owner	Individual Name on Record
Last Sale	$77,000 (Jul 2024)
Tax Bill	$9,474 (2024)
Deeds & Mortgages	Jun 2022 Sale
Flood Zone	Zone X (minimal risk)
APN	`472889 320.-2-42`

Property Details

APN / Parcel Number

Primary APN	`472889 320.-2-42`
Alternative APNs	`0500-320.00-02.00-042.000` `288932000000020420000000` `472800655530` `589770`

Exterior

Lot Area	6,098 sqft (0.14 acres)
Lot Dimensions	125 ft deep x 50 ft wide

Location & Zoning

Account Number	589770
Street Address	21 OAK ST
City	ISLIP
State	NY
Zip	11751-2807
Property Category	Residential
Property Type	Residential > Single Family > Home
Local Zoning Code	B
Legal Description	X2219746Y188711 T044H00000000
Legal Subdivision	MAP ISLIP MANOR
Legal Block	0002
Legal Lot Number	200
Jurisdiction	SUFFOLK NY
Township / Civil Division	ISLIP
Census Block Group	1
Census Block	1006
Census Tract	147401

Owner

Source: Suffolk County and Islip Town records, as of August 11, 2026

Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.

Owner of Record	Individual Name on Record
Mailing Address	21 OAK ST, ISLIP, NY 11751-2807
Occupancy	Owner Occupied
Owner Type	Individual
Vesting	Individual(s)

Deeds, Mortgages & Sale History

Assessor's Deed Record

Deed Names	Name on Deed
Last Sale	Jul 5, 2024 · Amount on Record
Deed Sale	Jul 5, 2024 · Amount on Record
Prior Sale	Oct 12, 1995 · Amount on Record
Deed Book / Page	13254 / 681
Prior Transfer Date	Jul 2, 2024
Record Updated	Sep 20, 2026

June 2022: Deed, Transfer

Document Type	Deed
Jurisdiction	SUFFOLK NY
Recording Date	Jun 28, 2022
Property Address	21 OAK ST, ISLIP, NY 11751-2807
Document Number	0131620484
Book / Page	13162 / 484
Instrument Date	Mar 29, 2022
Transaction Type	Transfer
Record Updated	Oct 4, 2022

Transaction

Tax	$0.00
Amount Accuracy	No Consideration Stated
Additional	Arm's Length

Transferred From (Grantor/Seller)

Name	Verified Name

Transferred To (Grantee/Buyer)

Name	Verified Name
Address	21 OAK ST, ISLIP, NY 11751-2807

Tax Assessment & Valuation

Source: Suffolk County and Islip Town assessment roll, as of August 11, 2026

Property Jurisdictions

Type	Name
State	New York
County	Suffolk County
County Subdivision	Islip Town
Unified School District	Islip Union Free School District (KG - 12)

Tax Bill & Assessment History

Year	Tax Bill	Assessed Value	Assessed Market Value
2025		$31,700 (-) Land $5,500 Building $26,200	$446,479 (-) Land $77,465 Building $369,014
2024	$9,474.00		$446,479 (+2.54%) Land $77,465 Building $369,014
2023		$31,700 Land $5,500 Building $26,200	$435,439 Land $75,549 Building $359,890

Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.

Flood

Source: FEMA National Flood Hazard Layer, effective September 18, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026

FEMA Flood Zone	Zone X minimal risk
Flood Insurance Requirement	Not required lenders may require it
Nearby Flood Policies	4 in force
Nearby Flood Claims	25 (1979–2023)
Claims Outside the SFHA	18 of 25
Most Recent Claim	Jul 2023 · river or lake flooding
Claims by Event	Severe Storms And Flooding, Mar 2010 · 2 claims

Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.

Wildfire

Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024

Wildfire Risk	Not rated no burnable land within ember reach

Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.

Drinking Water

Source: EPA Safe Drinking Water Information System, as of September 2026

Water System	SUFFOLK COUNTY WATER AUTHORITY serves 1,100,000 people · EPA ID NY5110526
Water Source	Groundwater
Last State Inspection	Jan 2024
Lead	1 ppb (2025–2027) action level 15 ppb

Violations Reported to EPA

Water Quality	Asbestos resolved · Jul 2020
Treatment and Procedure	None last 10 years
Monitoring and Reporting	None last 3 years

Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.

Internet Providers

Source: FCC Broadband Data Collection, based on 441 locations within half a mile, as of December 31, 2025

Provider	Max Down / Up (Mbps)
Optimum Fiber · Cable	8,000 / 8,000
Verizon Fiber	2,300 / 2,300